Glass mold



Sept. 11, 1928. 1,683,755

F. M. BIGELOW GLAS S MOLD Filed July 25, 1927 5 Sheets-Sheet 3 flktormq v in which the articles are so formed that fin Patented Sept. 11, 1928.

UNITED. STATES rmivx M. monnow, OFJEANNETTE, PENNSYLVANIA.

7 Application filed July 25,

The object of the invention is primarily to provide a glass mold in which a plurality of glass articles maybe simultaneously cut; to provide a construction of this character ishing after the casting operation is unnecessary or else reduced to a minimum if it has to be performed at all; to provide a con struction in which the formed articles are effectively separated from the'molten glass inthe glass receptacle of the mold and the desired shaping of the articles at this end simultaneously performed; and to provide a construction in which the articlecavities of the mold are provided with movable valves retractable after the articles are formed so that the latter may be readily removed.

lVith this object in view, the invention consists in a construction and combination of parts of which a preferred embodimentaccompanying drawings,

elevational view oft-hemold embodying the invention.

l in their Figure 2 is a sideelevational view. Figure 3 is a horizontalsectional view on the plane indicated by the line 3-3 of Figure 2. v r p i 1 v Figure 4 is a vertical sectional view on the plane indicated by the line H of Fig ure 3.

Figure 5 is a view'similar to Figure 3 but shows the feet of the finishing plunger final positions in the casting operation. 1

Figure 6 is a view similarto Figure 4 but shows thefiller plunger in position.

The mold comprises thebase and cap sections 10 and 1.1 which are preferably of cir' cular form and complemental to each other, thecap section being provided with depending studs 12 engageable in sockets 1 1 of the base section so as to properly register the parts, both the cap and base sections being formed with depressions defining article receivingcavities 15.

The base section is formed with a peripheral groove 16 of whichtlie upper side wall is defined by a ring 17 secured to the base member by appropriate fasteners 18 such asscrews, n the groove 16 is mounted a valve ring 19, the latter being formed with slots 20 disposedsubstantially tangentially of the ring. Disposed directly back of the article receiving cavities 15 are the valves 21 in the form of plungers movable in guideways center of the mold which places the valves 21 GLASS MOLD.

1927. Serial No. 208,298.

formed jointly in the base member and ring 17. The stems 22 of the valves 21 are slotted and the slottedportions straddle the valve ring 19, pins 23 spanning the slots in the stems and extending through the slots 20 in the ring. in theguide groove 16 and is therefore susceptible of angular or turning movement through audistance equal to the length of one The ring is loosely mounted of the slots 20 and the latter being disposed tangentially, angular movement, of the ring will impart radial movement to the valves 21. A tang 9A is carried by the valve ring 19 for thereception of a removable handle by means of which the valve ring and there--.

fore the valves may be actuated.

Centrallyof the mold there is formed the glass receptacle 25, the latter being poly onal in plan to provide as many sides as there are article receiving cavities 15 and the bottom of the glass receptacle is below the plane of the article receiving cavities which open into it through the several side walls.

With the cap member placed on the base member and thestuds 12 of the former :en-

gaging the sockets in the latter and thevalve V ring moved to a position-where the pins 23 are in those ends of. the slots 20 nearest the in ,positions where they constitute the outer side walls of the article receiving cavities 15, themold is in conditioni'or the reception of molten glass in the receptacle 25. The glass having been poured in the receptacle, the

filler plunger 26 is introduced therein, this filler plunger beingof a shape to conform to the receptacle 25. Depressing .the filler plunger, forces the. molten glass into the cavities 15 until the latter are filled. -VVhile the filler plunger conforms cross-sectionally to the glass receptacle, it is dimensioned slightly smaller than the latter, thus providing a small space 27 between it and the side walls of the glass receptacle into which. space the excess glass may find its way. To

provide, however, for the central disposition defined by the flange 28. The finishing plunger aside from thecross-head comprises a plurality of feet 31 carried at the lower ends of swinging arms 32, thearms being supported by the cross-head and the feet being moved toward and away from the cavities 15 by the actuator rod 33 winches slidably mounted in the cross-head and at its lower extremity has link connections 34 with the feet. The cross-head comprises the plate 29 and the yoke 29" and the actuator rod has a bearing in both and is provided between the two. with an adjustable collar 35 which limits its axial movement with respect to the cross-head.

When the finishing plunger is introduced, the depression of the actuator rod 33 after the plate 29 rests upon the top of the mold, will result in swinging the feet 31 toward their respective article receiving cavities with the result that the articles Wlll be separated from the glass remaining in the receptacle, If the articles being cast are door knobs, as shown in the illustrated cmbodiment of the invention, the inner faces of the feet may be formed with ribs 36 which result in the formation of radial ribs on the inner ends ofthe knobs so that the necessary anchoring means may be provided in the latter in the cement in which they are secured'in their fittings.

v The finishing plunger is introduced and withdrawn by means of theactuator rod 33,

so that whenever the weight of the crosshead is not supported by other means, as by the mold itself, the plunger feet are in let tracted'position indicated in Figure 3 and the'finishing plunger may thus be readily introduced'into and withdrawn from the receptacle 25.

In'the removal of the cast articles from the mold, the valves 21 are withdrawn by the.

tion 11 then lifted off, when the articles may.

be readily removed from the cavities in the base sectlon.

- The invention having been described, what is claimed as new and useful is:

1. A mold comprising base and cap sec tions jointly in which a plurality of glass receiving cavities are formed of the shape of articles to be cast, the mold having a glass it receptaclein communication with said cavities, means for forcing the glass from the glass receptacle into said cavities, and means,

actuable subsequent, to the first'said means to separate the cavity contained glass from that in the receptacle and complete the formation of the glass articles. i

2. A' mold compriiing base and cap sections jointly in which a plurality of glass receiving cavities. are formed of the shape 7 1 of articles to be cast, the mold having a glass receptacle in communication with said cavities and opening through the cap section, a

filler plunger insertable through the cap section for ejecting the glass into said cavities, and a finishing plunger for insertion into the receptacle after tlie withdrawal of the filler plunger, the former having means for separating the cavity contained glass from that in the receptacle.

3. A mold comprising base and cap sections jointly in which a plurality of glass receiving cavities are formed of the shape of articles to be cast, the mold having a glass receptacle in communication with said cavitics and opening through the cap section, a

finer P g insertable through the cap section for ejecting the glass into said cavities,

and a finishing plunger for insertion into section for ejecting the glass into said cav1- ties, and a finishing plunger for insertion into the receptacle after the withdrawal of the filler plunger, the formercomprising a crosshead and a plurality of swingingly mounted feet corresponding in number to the number of cavities, and means for moving said feet toward and away from the openings of communication between said cavities and said receptacle.

5. A mold comprising-base and cap sections jointly in which a plurality of glass receiving cavities are formed of the shape of articles to be cast, the mold having a glass receptacle in communication with said cavities and openin through the cap section, a filler plunger inscrtable through the cap section for ejecting the glass into said cavities, and a finishing plunger for insertion into the receptacle after the withdrawal of the filler plunger, the former comprising a crosshead and a plurality of swingingly mounted feet corresponding in number to the number of cavities, and means for moving said feet toward and an my from the openings of communication between said cavities and said receptacle, said means comprising an actuator rod slidably mounted in the cross-head andhaving terminal link connections with said feet. j,

6. Amold comprising base and cap sections jointly in which a plurality ofglass receiving cavities are formed of the shape of articles to be cast, plunger valves radially movable of the base member and defining having a glass receptacle in communication with the cavities and opening through the cap member, and filling and finishing plungrzrs successively insertable in said receptacle, the former for ejecting the glass from said receptacle into said cavities and the latter for separat-ing the cavity con tained glass from the receptacle contained glass. r

7. A mold comprising base and cap sections jointly in which a plurality of'glass receiving cavities are formed of the shape of articles to be cast,plunger valvesradially movable of the base member and defining the outer walls'of said cavities, the mold having a glass receptacle in communication with the cavities and opening through the cap member, and fillingand finishing plungers successively insertable in said receptacle, the former for ejecting the glass fromsaid receptacle into said cavities and the latter for separating the cavity contained glass from the receptacle contained glass, and a valve actuating ring mounted on the base member for angular or turning movement thereon and operatively connected with said valves for imparting radial movement to the same.

8. A mold comprising base and cap, sections jointly in which a plurality of glass receiving cavities are formed of the shape of articles to be cast, plunger valves radially movable of the base member and defining the outer walls of said cavities, the mold having a glass receptacle in communication with the cavities and opening through the cap member, and filling and finishing plung- V ers successively insertable in said receptacle, th'eformer for e ecting the glass'irom said receptacle into said cavities and the latter for separating the'ca-vity contained glass from the receptacle containedglass, and a valve actuating ring mounted on the base member for angular or turning movement thereon and operatively connected with said valves for imparting radial movement to the same, the base member having a ring detachably secured to it and the valve ring be ing mounted in the groove formed jointly in said ring and said base member, the alves having stems movable in guides formed jointly insaid ring and said base member.

FRANK M. BIGELOYV. 

